CN202342964U - Air bag type efficient solid-liquid separation press filter - Google Patents
Air bag type efficient solid-liquid separation press filter Download PDFInfo
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- CN202342964U CN202342964U CN201120389968XU CN201120389968U CN202342964U CN 202342964 U CN202342964 U CN 202342964U CN 201120389968X U CN201120389968X U CN 201120389968XU CN 201120389968 U CN201120389968 U CN 201120389968U CN 202342964 U CN202342964 U CN 202342964U
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Abstract
The utility model discloses an air bag type efficient solid-liquid separation press filter which comprises a bracket, a beam, a filter plate closing mechanism and a filter plate opening mechanism; a fixed end filter plate, intermediate filter plates and a movable end filter plate are sleeved on the beam; each of the fixed end filter plate, the intermediate filter plates and the movable end filter plate comprises a frame plate, a projection, filler cloth and an air bag, wherein the air bag, the projection and the filler cloth are arranged in the frame plate; high-pressure medium channels, liquid outlet holes, liquid collecting channels and feeding channels are arranged on the frame plates respectively; the high-pressure medium channels are communicated with the air bags respectively; the projection and the filler cloth are arranged on one side of the air bag of the fixed end filter plate as well as on one side of the air bag of the movable end filter plate; and the projections and the filler cloth are arranged on two sides of the air bags of the intermediate filter plates. According to the utility model, solid-liquid mixture can be press-filtered with high capacity by adopting expansion and two-way pressure filtration of the air bags, so that the operating efficiency is high, and the solid-liquid separation rate is high; and in addition, the after-treatment operation of separated solid or liquid can be simplified, and the effects of energy conservation and consumption reduction can be achieved.
Description
One, technical field: the utility model relates to a kind of Separation of Solid and Liquid filter press, particularly relates to a kind of gasbag-type solid-liquid high efficiency separation filter press.
Two, background technology: present domestic and international widely used sheet frame or chamber filter press, it adopts plane formula filter plate or diaphragm type filter plate isolated by filtration solid-liquid, and isolated solids liquid content is still very high, and filter efficiency is low.Sheet frame or chamber filter press; Use the filter of common constant volume filter chamber form; After soon each filter plate frame will compress, between each filter plate frame, form and filter cavity, the chamber space that forms between the common rigidity filter plate is unalterable; Its volume-variation amount that increases iris-diaphragm is also very little, and result of use improves and be few.
The filtration course of work of common filtration plate type pressure filter does, the solid-liquid mixed liquor is pumped to each chamber under the effect of infusion pump, and liquid passes filter cloth, discharges through the dark hole of filter plate, and solid is then intercepted by filter cloth, in filter pad chamber, piles up gradually, forms filter residue.Along with the continuity of filter process, filter cake thickness increases gradually, and the resistance that takes off liquid increases exponentially, and input quantity reduces to cause gradually can not be imported and stop.After taking off the liquid resistance and reaching certain value, treating capacity will sharply descend, and the big and weak effect of energy consumption is so it is long and to take off liquid measure few to take off the liquid time.The isolated degree of this constant volume press filtration separate mode amount of liquid; Under certain characteristic solid-liquid situation,, be the Separation of Solid and Liquid of low pressure filtering property by the pressure decision of delivery pump; Its liquid holdup is still about 75% when going out filter plate for general solid filter residue, and solid-liquid separation effect is bad.
For further from solidliquid mixture, isolating liquid; Reduce the moisture content of solids; The filter press that the membrane filter plate form occurred; Its filter with common van-type or frame filter press is compared, membrane filter plate be on the basis of original filter plate, increased can before and after a small amount of move add pressure surface---barrier film.When the barrier film rear side feeds high-pressure medium (like compressed air); This movably barrier film will bloat to the direction of filtering chamber; The filter chamber volume is reduced; Just after the pressurization constant volume filter process of delivery pump finishes, through the method that reduces cavity volume in a small amount the liquid in the solidliquid mixture is further discharged under the effect of elevated pressures, this process is known as the squeeze and filter stage; Be characterized in: make filter cake in filtering chamber pressurized equably on whole filtering surface, also further reduce with the further discharge solids volume of amount of liquid.The filtration of common relatively filter form is taken off liquid speed and is improved; The filter cake liquid holdup descends 10～20%, and treating capacity increases, but still there is following deficiency in it: 1. because barrier film is the single plane form; Its outside agitating under the force urges be to lean on the elasticity of manufacturing materials itself to realize; Therefore, its bulging mobility scale is very little, so the cubical content of filter chamber can not increase much on the structure; Treating capacity once is limited than the recruitment of common filter form, and integral filter efficient improves few; 2. owing to the restriction of first reason, the amount that expressing process reduces the filter chamber volume is also very little, so the fluid separation applications rate can only improve on a small quantity; 3. equally owing to first its press filtration working face of reason decision does not improve, it is little that fluid separation applications goes out liquid level, and flow is just low; Flow resistance is big, and is that the plane is pushed the plane, so the power pressure that needs is high; The energy consumption that just needs is big, and time of filter pressing is long.
Three, utility model content:
The utility model technical problem to be solved is: overcome the deficiency of prior art, the gasbag-type solid-liquid high efficiency separation filter press that a kind of production efficiency is high, the Separation of Solid and Liquid rate is high, energy consumption is low is provided.
The technical scheme of the utility model is: a kind of gasbag-type solid-liquid high efficiency separation filter press; Contain support, crossbeam, close filter plate mechanism and open filter plate mechanism; Be set with stiff end filter, intermediate filtered plate and movable end filter on the said crossbeam; Said stiff end filter, intermediate filtered plate and movable end filter all contain deckle board, projection, filter cloth and air bag, and wherein, said air bag, projection, filter cloth all are arranged in the said deckle board; Said deckle board is provided with high-pressure medium passage, fluid hole, liquid collection channel and feeding-passage; Said high-pressure medium passage communicates with said air bag, and air bag one side of said stiff end filter and movable end filter is provided with said projection and filter cloth, and the air bag both sides of said intermediate filtered plate are provided with said projection and filter cloth respectively.
Said projection is provided with protruding ring, and said protruding ring is continuous shape or is interrupted shape.Said protruding ring is annular, square annular or oval ring; The cross section of said protruding ring is trapezoidal.
Said projection and said air bag are split-type structural or integral structure.Air bag in the deckle board of said intermediate filtered plate is two, is provided with the next door between two air bags, and the outside of two air bags is provided with said projection and filter cloth respectively.
Said projection and filter cloth contact surface are provided with the salient point or the communication groove of comparatively dense, form the aisle space of filtrating; Said air bag is processed by the high crushing resistance material of high resiliency.
The beneficial effect of the utility model is:
1, the utility model adopts air bag bulging bidirectional filter pressing; Can realize big capacity press filtration solidliquid mixture, and can isolate the solids of high concentration, improve operating efficiency; More can make the post processing work of separated solids or liquid simple, make whole production system reach energy-saving and cost-reducing.
2, the utility model can be easily through change press filtration working face local shape and size; The press filtration that more is applicable to the various characteristics solidliquid mixture separates; And under the different operating condition, can control the press filtration degree, and obtaining the solid of different liquid contents, flexible operation is various.
3, the utility model uses high resiliency, high compression-resistant material to make air bag, and the convergent-divergent volume change is big, and filter area is big; Press filtration pressure is little, and resistance to compression is not fragile, and installing and replacing is convenient; Long service life, the maintaining amount is little, has improved press filtration production efficiency greatly; Reduced energy consumption, equipment itself and use cost are reduced greatly.
4, the utility model is used for solids extract property Separation of Solid and Liquid; Because it is very low that the liquid content of filter cake (isolated solid) can fall; In follow-up whole process of production; Can make transportation, store a large amount of raising the efficiency, especially can reduce the expense of heat drying significantly, remarkable to the reduction effect of production cost.
5, the utility model applied range; Can make the miniaturization filtering equipment that meticulous solid-liquid thing washing separates solid-liquid, can make filtering equipment realize the structural design that big capacity maximizes again easily, overall structure is simple; Low cost of manufacture; Solved the problem that press filtration amount of filter press was low in the past, the press filtration cycle long, the solids liquid content is high, its product marketing is wide, has good social benefit and economic benefit.
Four. description of drawings:
Fig. 1 is the structural representation of gasbag-type solid-liquid high efficiency separation filter press;
Fig. 2 is one of structural representation of intermediate filtered plate shown in Figure 1;
Fig. 3 is the structural representation of movable end filter shown in Figure 1;
Fig. 4 is the structural representation of stiff end filter shown in Figure 1;
Fig. 5 be among Fig. 2 A to one of view;
Fig. 6 be among Fig. 2 B to one of view;
Fig. 7 be among Fig. 2 A to two of view;
Fig. 8 be among Fig. 2 B to two of view;
Fig. 9 is the press filtration view of gasbag-type solid-liquid high efficiency separation filter press;
Figure 10 is the secondary press filtration view of gasbag-type solid-liquid high efficiency separation filter press;
Figure 11 is the gasbag-type solid-liquid high efficiency separation cake of filter-press view that comes off;
Figure 12 be intermediate filtered plate shown in Figure 1 structural representation two;
Figure 13 be intermediate filtered plate shown in Figure 1 structural representation three;
Figure 14 be intermediate filtered plate shown in Figure 1 structural representation four.
Five. the specific embodiment:
Embodiment one: referring to Fig. 1-Fig. 6 and Fig. 9-Figure 11, and among the figure, 1-deckle board, 2-air bag, 3-projection, 4-filter cloth, 5-cavity; The 6-inner chamber, 7-high-pressure medium passage, 8-feeding-passage, 9-fluid hole, 10-liquid collection channel, 11-space, 12-protruding ring; Fracture between 13-, 14-installing hole, 15-intermediate filtered plate, 16-stiff end filter, 17-movable end filter, 18-joint close, 19-support; 20-crossbeam, 21-close filter plate mechanism, and 22-opens filter plate mechanism, 23-feed pipe, 24-liquid outlet, the import of 25-medium; The 26-media outlet, 27-pressure delivery pump, 28-water-supply-pipe, the reverse water-supply-pipe of 29-, 30-filter chamber, 31-filter cake.
The crossbeam 20 of gasbag-type solid-liquid high efficiency separation filter press is fixed on the support 19; Stiff end filter 16, a plurality of intermediate filtered plate 15, movable end filter 17 are connected on the crossbeam 20 through the installing hole on it 14 successively; Under the pushing of closing filter plate mechanism 21 (like hydraulic cylinder) that is installed on the crossbeam 20, close up, joint close 18 sealings make the cavity 5 in the adjacent filter form airtight filter chamber 30.Through pressure delivery pump 27 solid-liquid mixing filtrate is passed through the feeding-passage 8 on stiff end filter 16, intermediate filtered plate 15, the movable end filter 17 again through feed pipe 23; Be transported to filter chamber 30; And under discharge pressure, filter out liquid; Liquid gets into liquid collection channel 10 through filter cloth 4 and space 11, fluid hole 9, is discharged by liquid outlet 24 at last.After being full of mixture in the filter chamber 30, continue the pressurization of depended on pressure delivery pump, partially liq is leached; Solids concentration increases to some extent; When solids concentration reached certain value, defeated material pressure can not work again, then stops to import filtrate; Accomplish the press filtration stage just, this moment, the liquid content of solid material was still very high.Open high-pressure medium air or other liquid, make it, simultaneously through the high-pressure medium passage 7 on intermediate filtered plate 15, stiff end filter 16, the movable end filter 17 from medium import 25; Get into the inner chamber 6 of air bag 2, under the effect of high-pressure medium, air bag 2 outside bulging; Promoting projection 3 moves to filter chamber 30 directions with filter cloth 4; The volume of filter chamber 30 is reduced gradually, implement the press filtration to filtrate, the liquid of extruding is equally through filter cloth 4 and space 11, fluid hole 9; Get into liquid collection channel 10, discharge by liquid outlet 24.Because the protruding ring 12 on the projection 3 is staggered relatively in the both sides of filter chamber 30; The convex-concave place can insert each other, realizes that squish area increases, and filter chamber 30 volumes reduce rapidly; Reach purpose quick, high efficiency separation liquid; And protruding ring 12 is cone body, produces lateral compression power, makes squeeze force not need very big just effectively press filtration.Protruding ring 12 on the projection 3 increases filter area, has accelerated the rate of filtration.Filter cake 31 volume and weights that obtain certain liquid holdup requirement through air bag 2 squeeze and filters are significantly reduced; The pressure that closes filter plate mechanism 21 pistons unclamps in the control system; Through opening filter plate mechanism 22 with separating certain space between movable end filter 17, the intermediate filtered plate 15, the high-pressure medium in the air bag 2 makes air bag 2 drive projection 3 and filter cloth 4 retractions from media outlet 26 releases simultaneously; After making this moment filter cake 31 break away from filter cloth 4; Freely fall into collection container, stick together, then with filter cake 31 shakes down through servicing unit like filter cake 31 and filter cloth 4.So far a press filtration cycle accomplishes.
The quantity of intermediate filtered plate 15 is different according to output, can many combinations use.Intermediate filtered plate 15 is made up of deckle board 1, air bag 2, projection 3, filter cloth 4, and deckle board 1 is provided with air bag 2 mounting grooves and high-pressure medium passage 7, feeding-passage 8, fluid hole 9, installing hole 14, liquid collection channel 10; Air bag 2, projection 3, filter cloth 4 symmetric arrangement can promote projection 3 to bilateral symmetry behind the entering high-pressure medium in the air bag 2 and outwards significantly move with filter cloth 4; Air bag 2 uses high resiliency, high compression-resistant material to make, and the convergent-divergent volume change is big, and resistance to compression is not fragile; Protruding ring 12 on the projection 3 is linked into an integrated entity by a flat board, has some fractures 13 on the protruding ring 12, and favourable liquid flows out, and the surface that contacts with filter cloth 4 on the projection 3 is provided with the salient point or the communication groove of comparatively dense, forms the aisle space 11 of filtrating.The sectional position of the protruding ring 12 of both sides projection 3 is staggered, 12 one-tenth tilted conical cross sections of protruding ring.Deckle board 1 is made with projection 3 available metals especially stainless steel or high strength nonmetallic materials.Stiff end filter 16 is similar with intermediate filtered plate 15 with movable end filter 17 compositions, and different is that deckle board 1 is one-sided worn-out mouthful, and air bag 2, projection 3, filter cloth 4 are respectively got half the, and air bag 2 still is an enclosed shape.
Adopt and alternately control clear water input and discharge high-pressure medium from water-supply-pipe 28 entering filter chambers 30 and air bag 2, then realize flushing repeatedly solids filtered, highly beneficial to the filtration of extracting useful composition in the solid.In filter chamber 30, do not import under the situation of filtrate,, then realize backwash filter cloth 4 from reverse water-supply-pipe 29 reverse input clear water.Whole filter press control by manually with the procedure auto-control form, automatically the correlated process operating time of control adopts and presets or input is regulated two kinds of patterns at random.
Embodiment two: referring to Fig. 7 and Fig. 8, present embodiment and embodiment one are basic identical, and something in common does not repeat, and difference is: projection 3 raising rings 12 side's of being designed to ring-types also can be designed to polygon shape or regular interrupted short section.
Embodiment three: referring to Figure 12, present embodiment and embodiment one have points of resemblance, and something in common does not repeat; Difference is: projection 3 is reduced to the polygon ring of a plurality of different-diameters or the different length of sides in intermediate filtered plate, stiff end filter and the movable end filter, or regular short section of arranging, and itself is separated from each other between each ring or the short section; Promptly have only protruding ring 12 parts, protruding ring 12 directly is coated on it in wall by air bag 2, is integrally formed the formula structure; Each ring or short section are linked together; For flexibly connecting, the surface that air bag 2 walls contact with filter cloth is provided with the salient point or the communication groove of comparatively dense, forms the aisle space 11 of filtrating between each ring or the short section.This embodiment makes press & filter plate structure simpler.When high-pressure medium got into the inner chamber of air bag 2, the cornice of air bag 2 moved protruding ring 12 outside bulging, promoted filter cloth and pushed to filtrate.When the filtrate that this embodiment gets in filter chamber was inhomogeneous, the wall between air bag 2 and the protruding ring 12 can outwards be heaved, and doubles to fill the space of filter chamber.
Embodiment four: referring to Figure 13; Present embodiment and embodiment three have points of resemblance; Something in common does not repeat; Difference is: the protruding ring 12 that is directly coated by air bag 2 parietal layers in intermediate filtered plate, stiff end filter and the movable end filter highly shortens, more to help the use of small-sized filter press.
Embodiment five: referring to Figure 14; Present embodiment and embodiment one have points of resemblance, and something in common does not repeat, and difference is: be not communicated with in the middle of the deckle board 1 in the intermediate filtered plate; Combining form in air bag 2, projection 3, filter cloth 4 usefulness stiff end filters and the movable end filter; This embodiment more helps flexible control, realizes the action need of different press filtration degree, more helps need not using the filter press of a plurality of intermediate filtered plates to use.
Embodiment six: present embodiment and embodiment five have points of resemblance, and something in common does not repeat, and difference is: projection, filter cloth also can adopt embodiment three or embodiment four directly to be coated on form and structure in the parietal layer.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Every technical spirit according to the utility model all still belongs in the scope of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did.
Claims (6)
1. gasbag-type solid-liquid high efficiency separation filter press; Contain support, crossbeam, close filter plate mechanism and open filter plate mechanism; Be set with stiff end filter, intermediate filtered plate and movable end filter on the said crossbeam; It is characterized in that: said stiff end filter, intermediate filtered plate and movable end filter all contain deckle board, projection, filter cloth and air bag, and wherein, said air bag, projection, filter cloth all are arranged in the said deckle board; Said deckle board is provided with high-pressure medium passage, fluid hole, liquid collection channel and feeding-passage; Said high-pressure medium passage communicates with said air bag, and air bag one side of said stiff end filter and movable end filter is provided with said projection and filter cloth, and the air bag both sides of said intermediate filtered plate are provided with said projection and filter cloth respectively.
2. gasbag-type solid-liquid high efficiency separation filter press according to claim 1, it is characterized in that: said projection is provided with protruding ring, and said protruding ring is continuous shape or is interrupted shape.
3. gasbag-type solid-liquid high efficiency separation filter press according to claim 2 is characterized in that: said protruding ring is annular, square annular or oval ring; The cross section of said protruding ring is trapezoidal.
4. gasbag-type solid-liquid high efficiency separation filter press according to claim 1, it is characterized in that: said projection and said air bag are split-type structural or integral structure.
5. gasbag-type solid-liquid high efficiency separation filter press according to claim 1 is characterized in that: the air bag in the deckle board of said intermediate filtered plate is two, is provided with the next door between two air bags, and the outside of two air bags is provided with said projection and filter cloth respectively.
6. according to each described gasbag-type solid-liquid high efficiency separation filter press of claim 1-5, it is characterized in that: said projection and filter cloth contact surface are provided with the salient point or the communication groove of comparatively dense, form the aisle space of filtrating; Said air bag is processed by the high crushing resistance material of high resiliency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120389968XU CN202342964U (en) | 2011-10-14 | 2011-10-14 | Air bag type efficient solid-liquid separation press filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120389968XU CN202342964U (en) | 2011-10-14 | 2011-10-14 | Air bag type efficient solid-liquid separation press filter |
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| CN202342964U true CN202342964U (en) | 2012-07-25 |
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| CN201120389968XU Expired - Fee Related CN202342964U (en) | 2011-10-14 | 2011-10-14 | Air bag type efficient solid-liquid separation press filter |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102814063A (en) * | 2012-08-14 | 2012-12-12 | 佛山市金凯地过滤设备有限公司 | Pressure filter and pressure filtration method thereof |
| CN102836581A (en) * | 2012-08-14 | 2012-12-26 | 佛山市金凯地过滤设备有限公司 | Pressure filter and pressing filtering method thereof |
| CN103113011A (en) * | 2013-01-16 | 2013-05-22 | 俞一鸣 | Desiccation device and method of sludge through high dehydration |
| CN103252120A (en) * | 2012-12-18 | 2013-08-21 | 管刚 | Pneumatic concentration pressure filtration integration machine and process |
| CN103316512A (en) * | 2013-06-24 | 2013-09-25 | 山东煤机装备集团有限公司 | Bag-type compensation device of vertical-type filter press |
| CN103405952A (en) * | 2013-08-30 | 2013-11-27 | 重庆三温暖电气有限公司 | Filter press control method and system |
| CN103405953A (en) * | 2013-08-30 | 2013-11-27 | 重庆三温暖电气有限公司 | Filter press |
| CN103405951A (en) * | 2013-08-30 | 2013-11-27 | 重庆三温暖电气有限公司 | Filter press |
| CN107213682A (en) * | 2017-07-19 | 2017-09-29 | 浙江天伟生物科技股份有限公司 | A kind of chamber-type press filter filter assemblies |
| CN107382009A (en) * | 2017-07-28 | 2017-11-24 | 浙江海河环境科技有限公司 | Super-pressure sludge high-drying degree dewatering |
| CN107596744A (en) * | 2017-10-30 | 2018-01-19 | 佛山市金凯地环保工程有限公司 | Filter-pressing plate with line type filtering structure |
| CN107626123A (en) * | 2017-10-30 | 2018-01-26 | 佛山市金凯地环保工程有限公司 | Circular diaphragm filter plate with line formula filtration |
| CN108339300A (en) * | 2017-12-28 | 2018-07-31 | 上海仁创环境科技有限公司 | Elastomeric seal becomes filter chamber plate and frame filter press |
| CN110772995A (en) * | 2019-10-24 | 2020-02-11 | 蔡林 | Barley β -amylase extraction process |
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| CN102836581B (en) * | 2012-08-14 | 2015-03-25 | 佛山市金凯地过滤设备有限公司 | Pressure filter and pressing filtering method thereof |
| CN102836581A (en) * | 2012-08-14 | 2012-12-26 | 佛山市金凯地过滤设备有限公司 | Pressure filter and pressing filtering method thereof |
| CN102814063A (en) * | 2012-08-14 | 2012-12-12 | 佛山市金凯地过滤设备有限公司 | Pressure filter and pressure filtration method thereof |
| CN103252120A (en) * | 2012-12-18 | 2013-08-21 | 管刚 | Pneumatic concentration pressure filtration integration machine and process |
| CN103113011A (en) * | 2013-01-16 | 2013-05-22 | 俞一鸣 | Desiccation device and method of sludge through high dehydration |
| CN103316512A (en) * | 2013-06-24 | 2013-09-25 | 山东煤机装备集团有限公司 | Bag-type compensation device of vertical-type filter press |
| CN103405953A (en) * | 2013-08-30 | 2013-11-27 | 重庆三温暖电气有限公司 | Filter press |
| CN103405951A (en) * | 2013-08-30 | 2013-11-27 | 重庆三温暖电气有限公司 | Filter press |
| CN103405952A (en) * | 2013-08-30 | 2013-11-27 | 重庆三温暖电气有限公司 | Filter press control method and system |
| CN103405953B (en) * | 2013-08-30 | 2015-05-20 | 重庆三温暖电气有限公司 | Filter press |
| CN103405952B (en) * | 2013-08-30 | 2015-07-15 | 重庆三温暖电气有限公司 | Filter press control method and system |
| CN103405951B (en) * | 2013-08-30 | 2015-09-30 | 重庆三温暖电气有限公司 | A kind of filter press |
| CN107213682A (en) * | 2017-07-19 | 2017-09-29 | 浙江天伟生物科技股份有限公司 | A kind of chamber-type press filter filter assemblies |
| CN107382009A (en) * | 2017-07-28 | 2017-11-24 | 浙江海河环境科技有限公司 | Super-pressure sludge high-drying degree dewatering |
| CN107596744A (en) * | 2017-10-30 | 2018-01-19 | 佛山市金凯地环保工程有限公司 | Filter-pressing plate with line type filtering structure |
| CN107626123A (en) * | 2017-10-30 | 2018-01-26 | 佛山市金凯地环保工程有限公司 | Circular diaphragm filter plate with line formula filtration |
| CN108339300A (en) * | 2017-12-28 | 2018-07-31 | 上海仁创环境科技有限公司 | Elastomeric seal becomes filter chamber plate and frame filter press |
| CN110772995A (en) * | 2019-10-24 | 2020-02-11 | 蔡林 | Barley β -amylase extraction process |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20121014 |